5. Place tuna in pan and sear approx. 2-3 minutes on each side. This should produce a Medium Rare piece of tuna, simply increase cooking time for a different doneness.

6. Remove tuna from pan.

7. Assemble sandwich in the following manner:a. One slice of breadb. Top with arugula, two slices of tomato, and drizzle with small amount of Extra virgin olive oil and balsamic vinegar c. Top with another slice of bread d. Brush with basil mayonnaise e. Top with two slices of tomato and piece of tuna f. Top with remaining slice of bread